US 12,078,769 B2
Monitoring system, monitoring device, monitoring method, and non-transitory computer-readable medium
Yukihide Yoda, Tokyo (JP); Yoshiaki Aono, Tokyo (JP); and Koji Asahi, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/441,395
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Dec. 13, 2019, PCT No. PCT/JP2019/049060
§ 371(c)(1), (2) Date Sep. 21, 2021,
PCT Pub. No. WO2020/202654, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-068644 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0171082 A1, Jun. 2, 2022
Int. Cl. G01V 1/22 (2006.01); G01D 5/353 (2006.01); G01V 1/01 (2024.01); G01V 1/30 (2006.01)
CPC G01V 1/226 (2013.01) [G01D 5/35358 (2013.01); G01V 1/01 (2024.01); G01V 1/30 (2013.01); G01V 2210/1425 (2013.01); G01V 2210/1427 (2013.01); G01V 2210/60 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A monitoring system comprising:
an optical fiber laid on a ground or a seabed;
an optical fiber sensing unit configured to receive an optical signal from the optical fiber and detect a vibration produced in the ground or the seabed based on the optical signal; and
an analyzing unit configured to identify a natural phenomenon that has caused the detected vibration based on a unique pattern of the detected vibration,
wherein the analyzing unit is configured to;
identify the natural phenomenon that has caused the detected vibration based on the unique pattern of the detected vibration using a trained model;
calculate a rate of match of the unique pattern of the detected vibration against a plurality of predetermined vibration patterns;
determine whether the unique pattern matches any of the plurality of predetermined vibration patterns based on the calculated rate of match; and
classify the natural phenomenon based on the calculated rate of match.